The Consortium

X-tendo brings together a highly experienced consortium of thirteen specialist institutions in technical and communication activities and organisations involved in implementing EPC schemes in ten countries.

The Energy Efficiency Unit Department (DUEE) acts as and represents ENEA in its official role of National Agency for Energy Efficiency, and is the national point of reference in terms of energy efficiency for the public administration, citizens, businesses and the territory.

In particular, the Department:

  • Provides technical and scientific consulting and support to central and local administrations and businesses.
  • Develops methods and tools for measuring and monitoring energy savings.
  • Develops and transfers technologies, methods and tools for improving energy efficiency to end-use sectors.
  • Promotes distributed generation and energy services.
  • Collaborates in the management of the main national incentive mechanisms for energy efficiency.
  • Carries out information dissemination, awareness-raising and training activities to spread a culture of energy efficiency and contribute to behavioural evolution.

The consulting and technical-scientific support to central administrations concerns the implementation of EU directives (Energy efficiency, Energy performance of buildings, Ecodesign, Energy labelling) also through the definition of measures and standards, the verification of the achievement of national objectives, the strengthening of territorial cohesion policies and the promotion of Italy to the international reference institutions (IEA, Certified Energy Manager, International Partnership for Energy Efficiency Cooperation, European Council and European Management Committees, etc.).

Local governments can also benefit from specialised services and consulting activities for the preparation of the regional energy-environmental plan, the management of the National Information System of Energy Performance Certificates (SIAPE).

The Department also manages databases relating to tax deductions, energy audits for energy-intensive and large enterprises, building energy performance certificates and information system of building thermal plants in the country.

In X-tendo, ENEA is the implementation partner for Italy. It participates in identifying good practices of the current EPC schemes and features to integrate in legislation.

Key contacts:

Fabio Zanghirella


The Energy Saving Trust (EST) is the UK’s leading impartial organisation helping people to save energy and reduce their carbon emissions. EST does this by providing expert insight and knowledge on energy saving and supporting people to take action. With a focus on the citizen, issues around energy use in residential buildings are central to its work, but EST also works on energy using products, personal transport and community energy. EST acts as a bridge between government, consumers, trade, businesses, local authorities and the energy market. EST has significant experience of designing, delivering and managing sustainable energy related programmes working with all these stakeholders providing advice, support, technical consultancy and grants. EST manages major contracts and projects for UK Governments, private sector and has considerable experience of working on a portfolio of EU-funded pan-European energy projects.

EST prides itself on delivering work that has purpose, is robust and has social outcomes that are provable and transparent. It has expert statistical, analytical and research and product policy experts who apply data-driven analysis, modelling and social research techniques to real-world situations. Its experienced evaluation teams design and deliver a full range of quantitative and qualitative research, monitoring and reporting techniques and methodologies to independently assess, evaluate and report on the impact of work it delivers.

In X-tendo, EST is the implementation partner for the UK. It participates in identifying good practices of the current EPC schemes and features to integrate in legislation.

Key contacts:

David Weatherall

Niroshini Bodinagoda

Harry Mayers


The aim of EASt is the increase of energy efficiency and use of renewable, domestic sources of energy in the interest of the regional development policy, environmental protection and long-term effectiveness. The Agency is the interface between administration, policy, research and the consumers of energy. Its activities comprise the technical and organizational support of energy projects, consciousness raising and PR works (exhibitions, publications, conferences etc.), trainings (expert further training, promotion of research), European cooperations (participation in EU-research and development projects), energy consulting, as well as the organization and award of grants. Energy efficiency in public buildings is of special interest to the agency highlighted by its participation in the IEE SUSTAINCO project, eCentral (Interreg) and NEWCOM (H2020) that specifically deals with nearly zero energy buildings. EASt, although a non-profit public institution performs economic activities on the market such as developing investment and feasibility studies, research activities and consulting services for both public and private sector.

In X-tendo, EASt is the implementation partner for Austria. It also participates in identifying good practices of the current EPC schemes and features to integrate in legislation.

Key contacts:

Heidrun Stu00fcckler

Christian Sakulin

The Danish Energy Agency (DEA) is the national authority in Denmark that monitors and develops the energy and supply sectors in Denmark. DEA is the responsible authority in the daily operations, supervision, quality assurance and future development of the EPC scheme in Denmark. The energy performance requirements for new residential and non-residential buildings were implemented in the Danish Building Regulation in 2006. All EPCs are registered in a central database administered by the DEA and are displayed on the public website. The EPC documents rate buildings on an energy efficiency scale ranging from A2020 (high energy efficiency) to G (poor energy efficiency). The EPC assigns an energy rating and lists cost-effective measures for improving the buildings’ energy performance.

In X-tendo, DEA is the implementation partner for Denmark. It also participates in identifying good practices of the current EPC schemes and features to integrate in legislation.

Key contacts:

Jacob Palm

Casper Thielsen


Tartu Regional Energy Agency (TREA) has been established to implement efficient energy management methodologies and practices. TREA provides independent and objective advice about local energy management to local stakeholders. TREA experts are working on fostering renewable energy use and energy management on household and organization level, as well as on community, municipality and regional level. TREA work fields are energy performance in buildings, efficiency in DH and in renewable energy systems, fostering co-operation between public and private sector. TREA has experience with energy action plans, feasibility studies of renewable energy systems (incl. biomass-based systems), sustainability and feasibility of local district heating systems, energy management and planning. TREA is running initiatives to promote and support community energy projects at local and regional level.

In X-tendo, TREA is the implementation partner for Estonia. It also participates in identifying good practices of the current EPC schemes and features to integrate in legislation.

Key contacts:

Kalle Virkus

Martin Kikas


VITO is a leading international research and service centre. It provides knowledge and technological innovations in the field of energy, chemistry, materials, health technology and land use that facilitate the transition to a more sustainable society.

Technology should be feasible and cost-effective. This calls for partnerships between research centres, commercial parties and the authorities, who together create impact in the sustainability transition. VITO is the driving force by providing practical knowledge, innovative processes and business models. VITO makes this connection between research, government and market, between knowledge, policy and business in order to create impactful changes.

VITO is, together with KU Leuven, UHasselt and imec, part of EnergyVille. EnergyVille is a collaboration in the field of sustainable energy and intelligent energy systems. The EnergyVille researchers provide expertise to industry and public authorities on energy-efficient buildings and intelligent networks for a sustainable urban environment. Within VITO/EnergyVille the unit on Smart Energy and Built Environment (SEB) works on the transition towards a sustainable society. Their research is on policy advice towards regional, nation, European and international governments. Research focus is on energy and emission scenarios, energy and climate policy, transport and mobility and complete sustainability assessments.

In X-tendo, VITO is the leader of the features smart readiness and real energy consumption and is responsible for the innovative EPC indicators and the related calculation methods.

Key contacts:

Birgit Vandevelde

Dorien Aerts

Maarten de Groote


The Romanian Association of Energy Auditors for Buildings (AAECR) is a professional non-governmental with central headquarters within the University POLITEHNICA of Bucharest but with local subsidiaries in other four historical regions of Romania. The association has currently more than 550 individual members, all certified energy auditors for buildings, and collective members or partners from major companies manufacturing innovative and efficient building elements. Founded in 2004, AAECR became in time the largest and most prestigious association on the Romanian building energy efficiency market. The major objective is to promote energy performance for the building stock by providing training as post-university studies for future-to-be auditors, by getting involved in development of the national legal framework and supporting the adoption of the most innovative and efficient technical solutions, and nevertheless by developing partnerships with major stakeholders in the EPB field.

AAECR will participate in the features real energy consumption, tailored recommendations and financing options and will do the testing for the features smart readiness indicator, comfort, real energy consumption, district heating, financing options and one stop shops.

Key contacts:

Emilia-Cerna Mladin


e-think is a start-up private non-profit research institution based in Vienna. Its aim is to advance research in the field of energy economics at its interface with environment and human society. Through technical, economic and environmental assessments e-think contributes to the transition towards sustainable energy systems. e-think‘s main areas of competence are:

  • Analyse socio-economic aspects of energy use
  • Model energy systems and develop scenarios
  • Assess impacts of energy policies
  • Develop effective and efficient deployment strategies for RES in electricity, heat and transport
  • Promote energy efficiency in buildings, mobility, electrical and industrial applications

e-think is a spin-off of the Energy Economics Group of Vienna University of Technology and, thus, practices strong cooperation in energy economics and modelling. In X-tendo, e-think is the leader of the feature district heating. He will also be responsible for the evaluation and documentation of test projects and will contribute to the estimation of EU-wide replicability potential.

Key contacts:

David Schmidinger

Marcus Hummel

The Energy Economics Group (EEG) is within the Institute for Energy Systems and Electric Drives at Technische Universität Wien. The core areas of research of EEG are:

  • Dissemination and integration strategies for renewable and new energy systems
  • Energy modelling, mapping and analysis of energy policy strategies
  • Competition in energy markets (liberalisation vs. regulation)
  • Global and local environmental aspects (life cycle analysis, cumulated energy demand, CO2-emissions)
  • Sustainable energy systems and climate change
  • Integration of RES-e in transmission grids
  • Macroeconomic studies (employment, value added) of RES, e-mobility, energy storage, energy efficiency and smart grids

EEG employs a permanent scientific staff of 25-30 people. The expertise of the staff members of EEG ranges across all disciplines necessary to analyse the above mentioned topics. EEG keeps up many national and international cooperation, and has long-term experience in managing many international as well as national research projects funded by the European Commission, national governments, public and private clients in several fields of research, especially focusing on renewable and new energy systems. As an example, X-tendo is one of the projects coordinated by EEG, together with other projects as for example Hotmaps, ENTRANZE and others.

Key contacts:

Lukas Kranzl

Ina Maia


The National Energy Conservation Agency (NAPE) was established in 1994 with the aim to popularize efficient and rational energy usage - above all in the building sector, and the principles of sustainable development.

NAPE is specialized in energy consulting, energy auditing and certification of buildings. NAPE is one of the few companies in Poland that elaborate energy performance certificates for complex buildings equipped with advanced technical systems and for public buildings.

NAPE participates in projects co-financed by the European Commission concerned with energy efficiency of buildings, financing modernization of buildings, renewable energy sources implementation, polygeneration, promotion of energy saving, integrated design, and innovative HVAC technologies.

In X-tendo, NAPE is responsible for the development of the methodology for assessing the outdoor air pollution indicator, which is one of the 10 features of the toolbox. NAPE is also responsible to deliver test project and perform testing within features the features outdoor air pollution, district energy and tailored recommendations and is an expert in the features outdoor air pollution and financing options.

Key contacts:

Jerzy Kwiatkowski


ADENE, the Portuguese Energy Agency, is a private non-profit association with a public interest status, supervised by the Secretary of State of Energy of the Ministry of Environment and Climate Action, whose activities and statutes are ruled by several Decree-Laws. ADENE is as part of the Portuguese Scientific and Technological System and has the mission to develop and enforce activities under public policies, to promote the efficient use of energy and water, by all and every day, contributing to a more sustainable society. ADENE´s vision is to be the centre of excellence for the energy transition, mobilizer of citizens and institutions, towards a more competitive, sustainable and low-carbon economy.

ADENE is the leader of the features financing options and one-stop-shops. It is the implementation partner for Portugal, responsible for delivering test projects under the features comfort, building logbook, financing options and one-stop-shops. ADENE will also participate in identifying good practices of the current and future EPC schemes as the National Expert.

Key contacts:

Neuza Rosa

CRES, the Hellenic National Energy Centre for Energy Efficiency and Renewable Energy Sources, is a public entity supervised by the Ministry for Environment and Energy. Its mission is to promote technological applications in the RE/EE fields both at a national and international level.

Throughout the 30 years of its operation, CRES has participated in more than 1000 European and National projects concerning applied research and technology development, demonstration and/or commercial application projects, energy modelling and development of energy policy plans and action plans, development of energy information systems, investment feasibility studies and activities for the promotion and dissemination of EE/RE. CRES also participates in EU funded Technical Assistance projects to non-EU countries (MENA region, EU Neighbourhood Region and Africa) transferring technical know-how on RES/EE technologies, capacity building, development of EE/RES National Policies and Strategies in line with the EU Directives and development of legislative/regulatory frameworks.

The Department of Buildings is within the Division of Energy Efficiency of CRES. Its main objective is the promotion of energy efficiency applications in the built environment. The main goal of the Department is to ensure optimal know-how transfer on energy efficiency in the building sector and to provide scientific and technological support to relevant market key actors (Government, private firms, developers, industry).

In X-tendo, CRES is the implementing partner in Greece, responsible for the feature on EPC databases. It will deliver test projects participate in identifying good practices of the current EPC schemes.

Key contacts:

Lena Lampropoulou - Project manager

Elpida Polychroni - Senior expert - Energy efficiency

Andreas Androutsopoulos - Senior expert - Energy efficiency

George Koras

The Buildings Performance Institute Europe (BPIE) is a not-for-profit think-tank with a focus on independent analysis and knowledge dissemination, supporting evidence-based policymaking in the field of energy performance in buildings, throughout Europe and beyond.

BPIE has a multifaceted approach to achieving efficiency improvements in buildings, and promotes policy support to further improve regulatory measures, financial incentives and market conditions that lead to the construction and retrofit of buildings with a high energy performance. The focus is on ensuring the vigorous implementation of the EU legislation linked to buildings across EU Member States, as well as to enhance financing of deep energy renovation of the existing buildings.

BPIE provides open-source research, analysis, knowledge-sharing and advisory activities to the European Institutions, policy-makers in EU Member States and neighbouring countries, the scientific community as well as private sector stakeholders and the civil society.

BPIE leads the dissemination and communication work and supports the analysis of the European context for on-bill schemes.

Key contacts:

Roberta D'Angiolella

Sheik Zuhaib


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